The ViewSonic E771 monitor has a horizontal frequency (Fh) range of 30-70 kHz and a vertical frequency (Fv) range of 50-120 Hz. This indicates that it can potentially support a refresh rate of up to 120 Hz, provided the video card can handle it. The human eye typically begins to notice flickering around 60 Hz, with higher refresh rates generally preferred for smoother visuals. Flat-panel monitors can often achieve higher refresh rates, while CRT monitors usually max out around 80-100 Hz. However, most LCD monitors are limited to refresh rates of 60 Hz, and flicker is less of a concern for these displays since they do not use phosphors. Some high-end LCD models may reach 70-80 Hz, but this is not common. Adjustments to the refresh rate can be made through the Control Panel in the device manager.